47 search results - page 2 / 10 » The expressivity of XPath with transitive closure |
OTM
2007
Springer
14 years 1 months ago
2007
Springer
Abstract The W3C has developed XPath [3] as a query language for XML data. XPath is embedded in many other languages like XQuery and XSLT. The name of XPath derives from its basic ...
EDBT
2009
ACM
14 years 2 months ago
2009
ACM
We introduce a controlled form of recursion in XQuery, an inflationary fixed point operator, familiar from the context of relational databases. This operator imposes restriction...
LICS
1999
IEEE
13 years 12 months ago
1999
IEEE
An important open question in complexity theory is whether the circuit complexity class TC0 is (strictly) weaker than LOGSPACE. This paper considers this question from the viewpoi...
ICDT
2003
ACM
14 years 25 days ago
2003
ACM
We study extensions of first-order logic over the reals with different types of transitive-closure operators as query languages for constraint databases that can be described by...
ICALP
2009
Springer
14 years 7 days ago
2009
Springer
We consider an extension of the guarded fragment in which one can guard quanti ers using the transitive closure of some binary relations. The obtained logic captures the guarded fr...